Hybrid Video Codec Based on Flexible Block Partitioning With Extensions to the Joint Exploration Model

Chien, Wei-Jung; Coban, Muhammed; Dong, Jie; Egilmez, Hilmi E.; Hu, Nan; Karczewicz, Marta; Said, Amir; Seregin, Vadim; Auwera, Geert Van Der; Bordes, Philippe; Galpin, Franck; Léannec, Fabrice Le; Poirier, Tangi; Urban, Fabrice

doi:10.1109/tcsvt.2019.2956455

Cited by 4 publications

(8 citation statements)

References 18 publications

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“…Multi-type tree (MTT) structures as were already proposed for the JEM have been used in most CfP responses [4], [12]- [16], [18]- [21]. The MTT (or QTBTTT) is a combination of a quadtree (QT) with nested binary trees (BT) as proposed for the JEM in [22] and triple-/ ternary trees (TT).…”

Section: A Multi-type Treementioning

confidence: 99%

“…Besides this static triple partitioning, more generalized variants have been proposed such as asymmetric binary tree (ABT) partitions [16] and generalized binary tree with shifts (GBS) [23]. The ABT concept adds asymmetric binary horizontal and vertical splits to the MTT using a 1:3 (or 3:1) ratio.…”

Section: B Asymmetric Binary Trees and Generalized Binary Treesmentioning

confidence: 99%

“…Two basic approaches have been suggested. One approach performs a (weighted) average of different reference lines [32], [33], [16] and the other approach allows the encoder to choose between several lines and signal the reference line used for prediction [20], [23].…”

Section: B Multiple Reference Linesmentioning

confidence: 99%

“…Motion vector predictors can be taken from previous, non-adjacent spatial blocks. Similar methods were presented in [30], [16] and [20]. The motivation follows the concept of HEVC merge, which is to allow a block to reuse the motion parameters from previously decoded blocks.…”

Section: H Non-adjacent Mvpmentioning

confidence: 99%

“…It was reported in the subsequent core experiment [44] that the method gives −0.45% luma BD-rate impact for the RA configuration. Other CfP responses allow to use even more non-adjacent blocks for fetching motion information as in [16], [20].…”

Section: H Non-adjacent Mvpmentioning

confidence: 99%

See 4 more Smart Citations

General Video Coding Technology in Responses to the Joint Call for Proposals on Video Compression With Capability Beyond HEVC

Bross

Andersson

Blaser

et al. 2020

IEEE Trans. Circuits Syst. Video Technol.

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After the development of the High-Efficiency Video Coding Standard (HEVC), ITU-T VCEG and ISO/IEC MPEG formed the Joint Video Exploration Team (JVET), which started exploring video coding technology with higher coding efficiency, including development of a Joint Exploration Model (JEM) algorithm and a corresponding software implementation. The technology explored in the last version of the JEM further increases the compression capabilities of the hybrid video coding approach by adding new tools, reaching up to 30% bit rate reduction compared to HEVC based on the Bjøntegaard delta bit rate (BD-rate) metric, and further improvement beyond that in terms of subjective visual quality. This provided enough evidence to issue a joint Call for Proposals (CfP) for a new standardization activity now known as Versatile Video Coding (VVC). All technology proposed in the responses to the CfP was based on the classic block-based hybrid video coding design, extending it by new elements of partitioning, intra-and inter-picture prediction, prediction signal filtering, transforms, quantization/scaling, entropy coding, and in-loop filtering. This article provides an overview of technology that was proposed in the responses to the CfP, with a focus on techniques that were not already explored in the JEM context.

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Section: A Multi-type Treementioning

confidence: 99%

Section: B Asymmetric Binary Trees and Generalized Binary Treesmentioning

confidence: 99%

Section: B Multiple Reference Linesmentioning

confidence: 99%

Section: H Non-adjacent Mvpmentioning

confidence: 99%

Section: H Non-adjacent Mvpmentioning

confidence: 99%

See 3 more Smart Citations

General Video Coding Technology in Responses to the Joint Call for Proposals on Video Compression With Capability Beyond HEVC

Bross

Andersson

Blaser

et al. 2020

IEEE Trans. Circuits Syst. Video Technol.

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Early Intra CU Size Decision for Versatile Video Coding Based on a Tunable Decision Model

Yang

Song

et al. 2021

IEEE Trans. on Broadcast.

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Block Partitioning Structure in the VVC Standard

Huang

et al. 2021

IEEE Trans. Circuits Syst. Video Technol.

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Versatile Video Coding (VVC) is the latest video coding standard jointly developed by ITU-T VCEG and ISO/IEC MPEG. In this paper, technical details and experimental results for the VVC block partitioning structure are provided. Among all the new technical aspects of VVC, the block partitioning structure is identified as one of the most substantial changes relative to the previous video coding standards and provides the most significant coding gains. The new partitioning structure is designed using a more flexible scheme. Each coding tree unit (CTU) is either treated as one coding unit or split into multiple coding units by one or more recursive quaternary tree partitions followed by one or more recursive multi-type tree splits. The latter can be horizontal binary tree split, vertical binary tree split, horizontal ternary tree split, or vertical ternary tree split. A CTU dual tree for intra-coded slices is described on top of the new block partitioning structure, allowing separate coding trees for luma and chroma. Also, a new way of handling picture boundaries is presented. Additionally, to reduce hardware decoder complexity, virtual pipeline data unit constraints are introduced, which forbid certain multi-type tree splits. Finally, a local dual tree is described, which reduces the number of small chroma intra blocks.

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Hybrid Video Codec Based on Flexible Block Partitioning With Extensions to the Joint Exploration Model

Cited by 4 publications

References 18 publications

General Video Coding Technology in Responses to the Joint Call for Proposals on Video Compression With Capability Beyond HEVC

General Video Coding Technology in Responses to the Joint Call for Proposals on Video Compression With Capability Beyond HEVC

Early Intra CU Size Decision for Versatile Video Coding Based on a Tunable Decision Model

Block Partitioning Structure in the VVC Standard

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